restrict php version to 7.1 and above

Author: makasim

composer.json

@@ -6,7 +6,7 @@
     "keywords": ["job", "time", "task", "time scheduler", "quartz", "chrono"],
     "license": "MIT",
     "require": {
-        "php": "^7.1",
+        "php": "^7.1.3",
         "symfony/framework-bundle": "^3|^4",
         "enqueue/enqueue": "^0.9",
         "queue-interop/queue-interop": "^0.7|^0.8",